This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 3 |
| 3 | 0 |
| 4 | 1 |
| 5 | 10 |
| 6 | -13 |
| 7 | 33 |
| 8 | -24 |
| 9 | 26 |
| 10 | 22 |
| 11 | -53 |
| 12 | 148 |
| 13 | -181 |
| 14 | 233 |
| 15 | -146 |
| 16 | 69 |
| 17 | 157 |
| 18 | -373 |
| 19 | 721 |
| 20 | -884 |
| 21 | 1071 |
| 22 | -1076 |
| 23 | 1041 |
| 24 | -444 |
| 25 | -425 |
| 26 | 1767 |
| 27 | -3225 |
| 28 | 5232 |
| 29 | -7144 |
| 30 | 7942 |
| 31 | -6920 |
| 32 | 4999 |
| 33 | -1112 |
| 34 | -5947 |
| 35 | 15481 |
| 36 | -24273 |
| 37 | 32103 |
| 38 | -39255 |
| 39 | 43839 |
| 40 | -37560 |
| 41 | 18235 |
| 42 | 6158 |
| 43 | -35079 |
| 44 | 81689 |
| 45 | -134919 |
| 46 | 167667 |
| 47 | -179256 |